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August 5, 2025 – New Delhi: A protest march led by opposition figure Arvind Kejriwal toward Prime Minister Narendra Modi’s residence on Tuesday highlighted growing anger over India’s push to make E20 ethanol-blended petrol the national standard. More than 200,000 people signed petitions opposing the move, but police blocked the march before it reached its destination. The government defends the policy as a way to cut crude imports and boost farmer incomes, but a vocal middle class—a key Modi voter base—says it’s bearing the cost of a rushed transition.
E20 is petrol blended with 20 percent ethanol, mostly derived from sugarcane. India has flirted with biofuels for decades because it imports over 80 percent of its crude oil. Under Modi, ethanol blending surged from below 1.5 percent in 2013-14 to 20 percent in 2025-26, saving roughly $20 billion in foreign exchange since 2014-15 and adding $16.4 billion to farmer incomes, according to government figures. The country, now the world’s third-largest auto market, sees the policy as a strategic win.
Many motorists worry that vehicles designed for lower ethanol blends will suffer engine damage and higher maintenance costs. Social media has been flooded with videos showing alleged corrosion, part failures, and drops in mileage. Political analyst Tehseen Poonawalla, who led a street protest last month, accuses the government of ignoring legitimate concerns. The government admits E20 may cut fuel efficiency by 3–5 percent but denies evidence of widespread engine failure. Junior Oil Minister Suresh Gopi told parliament last week that over 200 million two-wheelers and 300 million cars have run on E20 without “verified evidence of widespread engine failures or vehicle breakdowns.” Road Transport Minister Nitin Gadkari cited a study noting that older vehicles might need rubber parts replaced, but said such work is “easily managed during routine servicing.”
India’s auto industry largely backs the government. Maruti Suzuki, the country’s largest carmaker, says its E20 tests on E10-designed vehicles showed no red flags. Hero MotoCorp, a top motorcycle producer, reports no higher damage rates in E20 users. Toyota India dismissed a viral complaint as fuel contamination, not E20-related. However, some manufacturers have quietly warned that prolonged use of E20 in older models could void warranties, creating a potential liability for owners.
The United States has long used E10 as standard, with limited E15 availability. The U.S. Energy Information Administration notes that ethanol blends above 10 percent can cause corrosion in older engines and fuel systems not designed for higher alcohol content. The U.S. Environmental Protection Agency warns that using E15 in vehicles not approved for it may void warranties. India’s leap to E20 without a gradual phase-in mirrors early U.S. controversies, but American automakers gradually adapted over two decades. In contrast, India’s switch happened in roughly a decade, leaving many drivers with older vehicles exposed.
Critics demand that the government offer E10, E20, and unblended petrol at the pump without extra cost. The oil ministry rejected that last month, citing logistical nightmare and higher costs. “Maintaining multiple grades of base petrol across this vast supply chain would create an enormous logistical challenge, increase handling costs, complicate inventory management, and reduce operational efficiency,” it said. Opposition parties plan more protests, but the government shows no sign of backing down. For now, millions of Indian motorists are left with a fuel they didn’t choose and fears they say aren’t being heard.
